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Finding the Fourth Proportional to 769,793.80, 1,154,690.70 and 726,248.20

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Solution

The fourth proportional to 769,793.80, 1,154,690.70 and 726,248.20 is: 1,089,372.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,793.80 : 1,154,690.70 = 726,248.20 : x
  2. Step 2: Convert to fraction form
    769,793.80/1,154,690.70 = 726,248.20/x
  3. Step 3: Cross multiply
    769,793.80x = 1,154,690.70 × 726,248.20
  4. Step 4: Simplify right side
    769,793.80x = 838,592,042,431.74
  5. Step 5: Solve for x
    x = 838,592,042,431.74/769,793.80
  6. Step 6: Final answer
    x = 1,089,372.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.